Ascosteroside, a New Antifungal Agent from Ascotricha amphitricha II. Isolation and Structure Elucidation

The novel antifungal agent ascosteroside (1) was isolated from cultured broth of Ascotricha amphitricha (ATCC 74237). The structure based on spectroscopic data was determined to be an α-linked glycoside of a lanostane-type triterpenoid.